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Bidirectional airflow filter

a filter and airflow technology, applied in the direction of dispersed particle separation, separation process, chemistry apparatus and processes, etc., can solve the problem of inconsequential installation method of the installer of the filter, and achieve the effect of avoiding problems associated, reducing efficiency, and eliminating the inherent unidirectionality

Pending Publication Date: 2016-05-19
COLUMBUS INDS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The filter described in this patent has unique features that eliminate the issue of incorrect installation and improve its performance. It works equally well regardless of which side air enters first, and it doesn't matter how the filter is installed. This eliminates installation errors that can reduce efficiency and damage HVAC equipment. The filter has two layers of filtration media with two support layers that are only laminated between the filtration layers, resulting in a higher dust-holding capacity and lower pressure drop compared to conventional arrangements. The difference between the first embodiment and the prior art is believed to be due to compression of the upstream filtration layer against the support layer(s) in the invention. However, both filtration layers compress against support layers under air flow, which appears to increase the pressure drop of the media. However, the embodiment with support only on the outside has the same pressure drop as the prior art but higher efficiency.

Problems solved by technology

The filter has the same performance regardless of which side air enters first, and thus it is inconsequential how the installer installs the filter.

Method used

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  • Bidirectional airflow filter
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Examples

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Embodiment Construction

[0028]U.S. Provisional Patent Application Ser. No. 62 / 079,870 is incorporated in this application by reference.

[0029]A filter 8 is shown in FIGS. 1-3 having first and second major faces 6 and 6′ that air or another gas stream may impinge upon during normal use, as shown by the arrow in the magnified portion of FIG. 3. This may occur by placing the filter 8 across a duct or other gas path, and the gas stream may impinge at an approximately perpendicular angle to the major face 6. As shown in FIG. 4, which is a further magnified view of that portion of the filter 8 that is within the rectangle 4 in FIG. 3, the filtration media is made up of first and second layers 10 and 20 with a support layer 30 laminated therebetween. The layers 10 and 20, as with any filter media layer described herein, may be made of any type of conventional nonwoven fiber filtration media, including, without limitation, filter media made from spunbonded, meltblown, electrospun, needled, hydro-entangled, or wetla...

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Abstract

A filtration media that may be mounted in a frame and placed in a central heating, cooling and / or ventilation system. The media has symmetrical characteristics such that, when mounted in the frame, the resulting filter may be mounted with either one major surface of the filtration media receiving the air flow or the opposite major surface receiving the air flow. Regardless of how the filter is oriented, the performance of the filter is the same due to the symmetrical characteristics of the filtration media mounted therein.

Description

CROSS-REFERENCES TO RELATED APPLICATIONS[0001]This application claims the benefit of U.S. Provisional Application No. 62 / 079,870 filed Nov. 14, 2014. This prior application is hereby incorporated by reference.STATEMENT REGARDING FEDERALLY-SPONSORED RESEARCH AND DEVELOPMENT[0002](Not Applicable)THE NAMES OF THE PARTIES TO A JOINT RESEARCH AGREEMENT[0003](Not Applicable)REFERENCE TO AN APPENDIX[0004](Not Applicable)BACKGROUND OF THE INVENTION[0005]The invention relates generally to air filtration devices, and more particularly to a generally planar air filter that can operate with equal results regardless of whether it is placed in an air stream in one direction or the opposite direction.[0006]In the residential heating, ventilation and air conditioning (HVAC) market, there are many disposable pleated air filters on the market. Most such filters are made of non-woven filtration material laminated to a non-filtering support layer, the combination of which is then pleated and adhered to...

Claims

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Application Information

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IPC IPC(8): B01D46/16B01D46/12
CPCB01D46/12B01D46/16B01D46/10B01D2275/10
Inventor GILLILAN, CHRYSTAL
Owner COLUMBUS INDS